package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.entity.SetmealDish;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

/**
 * @author hyj
 * @create 2023--09--04
 */
@Service
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {
    @Autowired
    private DishFlavorService dishFlavorService;


    /**
     * 新增菜品,同时保存对应的口味数据
     * @param dishDto
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDto dishDto) {
        //保存菜品基本信息到菜品表dish中
        this.save(dishDto);

        Long dishId = dishDto.getId();//菜品id

        //菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();

        flavors = flavors.stream().map((item)->{
            item.setDishId(dishId);
            return item;
        }).collect(Collectors.toList());

        //保存菜品口味数据到菜品口味表dish_flavor
        dishFlavorService.saveBatch(flavors);


    }

    @Override
    public DishDto getByIdWithFlavor(Long id) {

        //查询菜品基本信息
        Dish dish = this.getById(id);

        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish,dishDto);

        //查询菜品口味信息
        LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(DishFlavor::getDishId,dish.getId());
        List<DishFlavor> list = dishFlavorService.list(lambdaQueryWrapper);

        dishDto.setFlavors(list);
        return dishDto;
    }

    /**
     * 更新菜品信息,同时更新对应的口味信息
     * @param dishDto
     */
    @Override
    @Transactional
    public void updateWithFlavor(DishDto dishDto) {
        //更新菜品表
        this.updateById(dishDto);

        //清理当前菜品对应的口味数据 --delete
        LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(DishFlavor::getDishId,dishDto.getId());
        dishFlavorService.remove(lambdaQueryWrapper);

        //添加当前提交过来的口味数据 --insert
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item)->{
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());

        dishFlavorService.saveBatch(flavors);
    }

    /**
     *删除菜品信息,同时删除对应的口味信息
     * @param ids
     */
    @Override
    @Transactional
    public void removeWithFlavor(List<Long> ids) {
        //查询菜品状态,确定是否可以删除
        LambdaQueryWrapper<Dish> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.in(Dish::getId,ids);
        lambdaQueryWrapper.eq(Dish::getStatus,1);
        int count = this.count(lambdaQueryWrapper);

        //起售中,不能删除,抛出异常
        if (count > 0){
            throw new CustomException("菜品正在售卖,不能删除");
        }

        //可以删除,先删除套餐中的数据
        this.removeByIds(ids);

        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(DishFlavor::getDishId,ids);
        dishFlavorService.remove(queryWrapper);

    }
}
